Nonlinear fitting with the Levenberg-Marquardt method.

[Pierre Delfosse <pierre.delfosse@centexbel.be>]

Dear S+ users,


I would like to fit a non linear model using the Levenberg-Marquardt method
(which makes use of the standard deviations of the observations).

Any help would be appreciated.

Regards.

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Pierre Delfosse                                 Address:   CENTEXBEL
pierre.delfosse@centexbel.be            avenue du parc, 38
Telephone:      32-87-322443                    B-4650 Chaineux BELGIUM
Fax:                    32-87-340518